2149887 has 4 divisors (see below), whose sum is σ = 2866520. Its totient is φ = 1433256.

The previous prime is 2149883. The next prime is 2149897. The reversal of 2149887 is 7889412.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2149887 - 2² = 2149883 is a prime.

It is a super-2 number, since 2×2149887² = 9244028225538, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358312 + ... + 358317.

It is an arithmetic number, because the mean of its divisors is an integer number (716630).

2^2149887 is an apocalyptic number.

2149887 is a deficient number, since it is larger than the sum of its proper divisors (716633).

2149887 is an equidigital number, since it uses as much as digits as its factorization.

2149887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716632.

The product of its digits is 32256, while the sum is 39.

The square root of 2149887 is about 1466.2492966750. The cubic root of 2149887 is about 129.0640268665.

It can be divided in two parts, 214 and 9887, that added together give a palindrome (10101).

The spelling of 2149887 in words is "two million, one hundred forty-nine thousand, eight hundred eighty-seven".